10Download Tool

11Firefox PDF Viewer

Starting with version 19, Firefox can display PDF documents without the help of a plugin. Note the yellow warning bar at the top of the viewer stating that all the PDF features may not be showing. For simple documents, however, the viewer works just fine, letting you zoom and print just as you'd expect.

17Firefox : No Forward Button

18 Firefox Sync

You can keep your bookmarks, settings, passwords, form data, and even open tabs synced across different computers in different locations. The setup creates a key that you need to enter into the other PCs you want to keep in sync.

24Do Not Track

Mozilla made the anti-tracking option more up-and-front in Firefox 5, and claims its the first cross-platform browser to include such a feature. But keep in mind, all it does is set a header entry telling sites you don't wish to be tracked, so it's up to the trackers to abide by your wishes.

28Awesome Bar – Switch to Tab

29Add Ons Manager

In another nod to Chrome, Firefox's add-ons manager now resides in what looks like a Web page. In its present form, it's a little harder to simply find the most popular extensions and their ratings, but you can still head to the Mozilla Web page for this. Firefox is still customizable in appearance, too, thanks to Personas and Themes.